Preliminary Data Sheet
January 19, 2012
3A Analog Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 3A output current
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should
always be provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel. The test set-up
is shown in Figure 46. The preferred airflow direction
for the module is in Figure 47.
25.4_
Wind Tunnel
PWBs
(1.0)
Figure 47. Preferred airflow direction and location
of hot-spot of the module (Tref).
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 46. Thermal Test Setup.
The thermal reference points, Tref used in the
specifications are also shown in Figure 47. For reliable
operation the temperatures at these points should not
exceed 120oC. The output power of the module should
not exceed the rated power of the module (Vo,set x
Io,max).
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
LINEAGE POWER
17
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
